Steam-actuated valve



(No Model.)

J. T. TOOLB. STEAM AGTUATBD VALVE.

No. 335,855. Patented Peb. 9, 1886.

JZ" D ,f/m'f Y l ATTOR Ys.

N4 PETERS. Photo-mnugmpher. Washington. U. C,

limitan drames y Partnr rrien..

JOHN T. TOOLE, OF EAST SAGTNAVV, llllCHlGAN.

STEAVlwACTUATED VALVE.

SPECFICATEON forming part of Letters Patent No. 335,855, dated February 9, 1856.

Application lileil November l2, 1885. Serial No.18,567. (No model.)

To all whom it may concern.-

Be it known that I, JOHN T. TooLn, of East Saginaw, in the county of Saginaw and State of Michigan, have invented a new and Inn proved Steam Actuated Valve for Steam` Pumps, of which the following is a full, clear, and exact description.

The object of my invention is to provide a new and improved valve-gear for stean1- pumps, which permits the starting or stopv ping of the pump without leaving it on the dead-center, and which allows the pump to work with regularity.

The invention consists in the construction and arrangement ,of parts, as will be hereinafter fully described and claimed.

Reference is to be had to the accompanying drawings, forming a part of this specication, in which similar letters of reference indicate corresponding parts in all the igures.

Figure l is a longitudinal vertical section of iny improvement attached to the steam-cylinder. Fig. 2 is an inverted plan vicw of the auxiliary steam-chest. Fig. 3 is a vertical cross-section on the lines al of Fig. 1, and Fig. 4 represents a modification.

The steam-cylinder A, having the main ports ci and b and the exhaust-port c, is provided with the piston B, to which is attached the pistonrod C. The steam-chest D is provided with the cylindrical valve-seat D, in which moves the main valve H. Between the steamchest D and the cylinder A is placed the auxiliary steam-chest E, having the cylindrical valve-seat Ff, in which works the auX- iliary valve or piston F, provided with the annular recesses F and F2. The auxiliary valve F is provided on the outside of the auX iliary stcan-i-chest E with the stem F3, on which are fastened, by means of set-serews, the collars FA1 F5, placed at suitable distances apart, and between which slides the ripper end of the arm G,fastened to the piston-rod C. The auX- iliary stcam-chestE is also provided with the three ports cl, c, and f, which correspond with the upper ends of the ports a, b, and c of the steam-cylinder A, and with the similar ports, g, h, and z', leading to the valve-seat E of the steam-chest D. The auxiliary steam-chest E is also provided with the ports la and Z, the upper ends of which connect with similar ports im and a, leading to the ends ofthe valveseat D of the steam-chest D, and the lower ends of the said ports k andi connect with the exhaustport c of the steam-cylinder A by means of the recesses 0 and p, cut in the under face of the auxiliary stean1-chestE- The steam-chest D is provided on top with the steam-inlet D, which connects with the steam-chan1ber D, leading to the valve-seat D. The main valve or piston H is provided with three annular grooves, H, H2, and H, of which the grooves H and H3 alternately connect the steam-chamber D4 with the ports g and il, and the groove H2 connects alternately the ports g and i with the exhaust-port h. The valve H is provided with longitudinal grooves Ht, so as to admit steam behind its ends to forni a steam-cushion in the valve-seat D. The cylinder A is also provided on each end with a small groove, R, which extends from the ports a and b to the cylinder-heads, so as to form a steam-cushion for the piston B, and also to start the piston B on its return-stroke in the opposite direction by admitting live steam through the small groove R to the back ot' the main piston B.

The operation is as follows: The piston and valves, as shown in Figs. l and 3, are in the position they occupy when in the center of the stroke. The steam enters through the inlet D2, and passes from the chamber D around the annular groove H3 to the ports t', f, and b, and to the steam-cylinder A, thereby moving the piston B in the direction of the arrow a. lllhe steam on the other side of the piston B passes through the ports a., d, and g into the' valve-seat D around the annular groove H2, and down through the ports h and e into the exhaust-port c, from which it can escape by the outlets c and c, formed on each side ofthe steanrcylinder A. Vhen the piston B cornes near the end of its stroke, the arm G strikes the collar F'i and moves the auxiliary valveF in the direction of the arrow a', so that the ports F and 7c are disconnected and the ports F2 and Z are put in communication with eachv other, so that the live steam exerting pressure against the valve H in the annular grooves H and H3 moves the valve H in the inverse direction of the arrow a', thereby connecting the steam-chamber D4 with the port g, and placing the ports H2, L, and t' in communication with each other, so as to reverse the mo tion of the piston B. The same movements in IOO reverse order take place, as stated, until the arm G strikes the other collar,F5, whereby the ymovement of the piston is again reversed. The steam in the valve-seat D behind the 5 ends of the main valve H exhausts alternately through the ports n, F 2, and Z into the groove p and through the ports m, k, and F and the groove o into the exhaust-port c.

In the modication, as shown in Fig. 4, I

ro attach to the main valve H a common slidevalve, T, Which operates in precisely the sanie manner as the an-nular recess H2 of the valve H, as before described.

Having thus described my invention, I claim f5 as new and desire to secure by Letters Patentthe top, the piston B, the auxiliary steamchest E, resting on thev cylinder A and having central ports, d ef, registering with the ports a c b, and end ports, k l, leading through passages o p, between the cylinder and chest, to the exhaust c,the auxiliary valve or piston F, having annular spaces F F2, to register with ports k Z, and intermittently operated from the piston B, the chest D on the chest E, having ports g h t' in alignment With the ports d cfa c b,end ports, m min alignment With the ports 7c l, inlet-port D3, and a sliding valve in the chest D,adapted to close the .ports m g h enone stroke and open the ports t' Z, and vice versa,

substantially as set forth.

JOHN T. TOOLE. Witnesses:

PHILIP ACKER, GEO. E. HARTNELL.' 

